BCM5220 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – 10/100BASE-TX SINGLE-CHANNEL SIGNI-PHY-TM TRANSCEIVER

OVERVIEW
TD+
RD+
Multimode
Xmt DAC
Baseline
Wander
Correction
ADC
SD+
XTLO
XTLI/REF_CLK
VREF
RDAC
CRS/Link
2
Detection
Clock
Generator
Bias
Generator
10BASE-T
PCS
Digital
Adaptive
Equalizer
10BASE-X
PCS
Auto-Negotiation/
Link Integrity
Clock
Recovery
LED
Drivers
MII
Registers
MII
MGMT
Control
4 ^TXD[3:0]
TXEN
TXER
TXC
COL
RXC
CRS
RXDV
RXER
4
RXD[3:0]
ACTLED#
LNKLED#
SPDLED#
RCVLED#
XMTLED#
MODES
MDC
MDIO
Lowest-Power Fast Ethernet PHY
With a power dissipation of 250 mW, the BCM5220 is the industry’s
lowest-power Fast Ethernet PHY. It features an integrated voltage
regulator, and can be supplied by either a 2.5V or 3.3V power source. In
addition, the BCM5220 has several intelligent power-down states that
conserve power, yet allow products based on it to automatically turn on
when needed.
The BCM5220 includes a unique Intelligent Power-Management feature
that powers down the device if energy is not detected on the cable. This
feature is especially useful for portable and power-sensitive applications
such as laptop LAN card adapters. The BCM5220 allows PCMCIA or
CardBus adapters to remain plugged in and draw virtually no energy
even if the client is no longer connected to the network. Because most
laptop users do not remove their LAN PC card when working remotely,
this feature results in a noticeably extended battery life for laptop
computer users.
The BCM5220 can be set to periodically wake up at a userdefined
interval, allowing the product to initiate keep-alive traffic on the
network. For lowest power consumption, the BCM5220 can be put in a
power-off state (<2.5 mW).
Network Tolerance
Cable-sourced electrostatic discharge (CESD) is a recently discovered
phenomenon that occurs when an electrically charged network cable is
plugged into a networked product, an issue becoming more prevalent
with recent cable installations. The BCM5220 has been designed and
tested to withstand over 5 KV of CESD, which unlike other transceivers
prevents the device from being destroyed in a CESD event.
DSP-Based PHY Technology
The BCM5220 builds on Broadcom's proven DSP PHY design and full
custom circuit design techniques to create a highly integrated and robust
physical layer solution. DSP techniques allow the BCM5220 to achieve
high interoperability and to exhibit robust performance across voltage
(±0%), temperature (-40 to 85C°), and process variations. Broadcom's
DSP-based, Digi-PHY™ technology has been proven in the shipment of
over 400,000,000 Fast Ethernet ports. Broadcom's superior quality has
resulted in a failure rate well under 10 PPM.
Broadcom^®, the pulse logo, Signi-PHY™, Digi-PHY™ and Connecting everything^® are trademarks of
Broadcom Corporation and/or its subsidiaries in the United States and certain other countries. All other
trademarks mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5220-PB03-R
07/06/04
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.broadcom.com